Regulating burner cap



H. C. CALDWELL REGULATING- BURNER CAP Filed Aug. 31

Mam

Patented Sept. 16, 1924.

HENRY C. CALD'W'ELL, OF BUFFALO, NEW YORK.

REGULATING BURNER CAP.

Application filed August 31, 1922. Serial No. 585,402.

for and process of burning gas, and more particularly to such means and process, whereby the height of the flame may be adjusted and maintained at a predetern'iined distance above the burner, irrespective of the gas pressure or velocity.

It is well known to those skilled in the art, that the ordinary gas burner is so located that the cooking utensil will be dis posed at the most efficient point when the burner is working under normal conditions. When, however, the gas pressure is low, the velocity of the gas mixture will also be low, and the flame on such a burner will not reach the cooking utensil under these conditions, and the already poor efliciency in such a burner will drop very materially.

The principal object of my invention has been to overcome the disadvantages above enumerated, and to provide a burner which is not only very efficient under normal conditions, but one which will also efficiently burn gas when at a lower pressure.

Another object has been to pr'ovidea burner so arranged that a number of the burner openings may be covered or uncovered to suit the gas pressure and velocity, whereby the size or lateral dimensions of the flame may be governed in accordance with the pressure and velocity so as to bring the flame height to the desired predetermined dista nce.

Another object has been to provide a gas burner, having comparatively large orifices, whereby all kinds of gas may be burned without any change.

' Furthermore, the orifices are in the form of passageways of sufficient length so as to prevent back-firing when a very rich gas is used, or when the gas pressure is low.

Moreover, my burner is of such a nature that all parts are easily disassembled and made accessible for thorough cleaning.

The above objects and advantages have been accomplished by the device shown in the accompanying drawings, and by the process which may be carried out by such a device. In the d'awings:

Fig. 1 is. a plan view of my complete burner, partly in sections.

Fig. 2 is a side, sectional elevation of the same.

Fig. 3 is a fragmentary, plan view showing a modified form of invention.

Fig. dis a fragmentary, plan view of another modified form of invention.

F ig. 5 is a'fragmentary, sectional elevation of the modification shown in Fig. 4.

Referring to Figs. 1 and 2, the burner comprises a base 10,-provided with a mixer 7 tube 11, at the outer end of which is formed a mixer 12. I At the end of the mixer 12 is the customary air regulator 13, comprising preferably two plates as shown, which may be relatively rotated to increase or decrease the air openings in the well known manner. Arranged at the center of the air regulator is a gas cock20. The upper surface 14 of the burner is preferably flat, in the face of which is provided a number of recesses 15. Each of these recesses is bounded on one side by a radial surface 16 and on the other side preferably by a series of steps 17. The base is provided in its center with a well 18, which has an opening 19 at its upper en This opening is in communication with the series of recesses 15, whereby the combustible mixture is supplied to the recesses. Arranged over the base 10, and rotatable thereon, is a muffle 25, which is preferably provided with a downwardly extending an nular flange 26 at its outer edge, for engagement with the upper edge of the base, whereby the muflie will be kept in position and yet permit its being rotated. The mufile is provided with a series of upstanding ridges 27-. These ridges are arranged preferably in a radial manner, and a series of apertures orpassageways 28 is formed in each of them. These apertures are relatively larger than-those usually provided in gas burners and thus it is possible to use my burner on any of the difierent kinds of gas. Even though the apertures are large, the length of the passagewaysis such that all baclt-firing'is prevented.

The passageways are preferably s' aced at such a distance from each other that tne outer row of them will register with the steps 17 bounding one side of each of the recesses 15 in the base. When the muflie is placed upon the burner base and the radial series of passageways i brought in register with that part of each recess 15, which lies adjacent the radial side 16 thereon, all of the passageways 27 of the muffle will be opened, and gas will be allowed to pass through all or them. Then, however, the mutlie is rotated in a clockwise direction, one, two, three, four, or more of the passageways may be closed by the engagement of the fiat top 1% of the base with the bottoms of such apertures.

In the modified form of the invention shown in Fig. 3, the recesses 30 are bounded on one side by a. strai ht radial uri ace 31 and on the other side by a straight angular-1y arranged surface 32. In this form or invention, some oi. the apertures will be tially closed is" th rotation of he i while others will be fully closed, depending upon the amount oat rotation of the muiilee 1f the muiile is rotated so that the radial series of passagewas are in register with the flat surfaces all oi tl e apertures covered by such surfaces will be fully closed.

In the modified form; shown in Figs. at and 5, 35 is the base of the. burner, and 36 the muffle. The mul'fie is arran ed over the base, as in the other forms, but. is not rotatable therewith. The recesses in the base are omitted and a. disc 3? is arranged re'ierably between the base and the lllil'l'llfi. This disc is provided with a handle 38, which extends through aslot 89 formed in the flange oi the mullie. In this form of device, the disc 18 provided with a. series of recesses l0, bounded on one side preferably by a radial surface 41 and on the other side preferably by means of the stepped surface if desired the stepped surface may be omitted, and the angularly arranged surface of the form shown in Fig. 3 employed. In this form of the invention, th apertures or passageways of the mufile 36 are controlled by an oscillation of the disc 37.

In carrying out my process by means of the apparatus herein shown and described, the gas is turned on at the gas cock 26, the air openings having been previously adjusted so as to give maximum results with the gas being used under its normal pressure. The gas and air are then mixed in the mixer 12 and are conducted through the mixer tube 11 into the well 18. From the well the mixture is conducted to the series of radial recesses 15 whence it passes into and through the re istering apertures or p ssageways 28. Of course, the passageways, which lie over the well 18 are always supplied with gas,

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irrespective of the position of the muffle. The muille is now adjusted to either increase or decrease the number of passageways 28, through which the gas mixture passes, whereby the height of the flame may be controlled. It will be seen that by means of a rotatable muffle, substantially one-half of the passageways 28 may be cut off or closed, thus confining the flame area to the center of the burner, and, of course, increasing its height. This is, of course, only needed when the pressure is so low that the flame will not reach the height at which most eliicient heating results, but by reducing the number of apertures, the height or the flame may be easily controlled and brought to the predetermined point.

\Vhile l have shown and described number of forms of apparatus by which my process may be carried out, it is obvious that detailed modifications may be made in the apparatus, and that the proce may be carried and described; and i do not, therefore, wish to be limited to the exact en'ibodiments herein shown and described.

Having thus described my invention, what I claim is:

l. A gas burner comprising a base: portion, and a muiiie, the base portion being formed with a flat top and provided with radially arranged recesses, each recess being of varying width, whereby a number of passageways in the muilie may be closed by the oscillation thereof.

2. A gas burner comprising a base portion having a s ries of radial recesses at its upper face, such recesses being so formed as to have varying widths throughout their length and a muffle, the muffle being rotatable and provided with a series of con-- cent "ically and radially arranged passageways so that a predetermined number oi such passageways may be registered with th recesses.

A gas burner comprising a base portion having a series. of radial recesses at its upper face, such recesses being so formed as to have varying widths throughout their lengths, and a. miufi'le, the muflle being rotatable and provided with a series of comparatively long concentrically and radially arranged passageways so that predetermined number of such passageways may be registered with the recesses.

In testimony whereof, I have hereunto signed my name.

HENRY C. CALDWELL.

out by other forms than those. shown 

